Question

The copper wire has length and a cross section area are(l,a), (2l,a/2a).Resistance is minimum in

Answer 1

Answer:

We know that , R∝

A

l

;

So, the resistance of the wire will be minimum when the area of cross-section is maximum and length is minimum.the wire of cross-sectional area have maximum area and minimum length hence it will have minimum resistance out of all other combinations.